8
A monotonous, expressionless person, lacking any enthusiasm or emotion. The term comes from hospital lingo, where a patient is said to flatline when a continuous straight line is displayed on their heart monitor, indicating death.
"...as excited as that flatline can get. I had to remind him twice to keep breathing."
by Der Golem February 07, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
9
An alcoholic beverage (a "bomb") made by dropping a shot of one part Goldschlager and one part Jagermeister into a vodka redbull. Consumption of multiple flatlines may cause one to become "flatlined."
Gully: Yo I had like twelve flatlines last night. I wasn't that drunk though.
Person number 2: No. You were flatlined, you got kicked out, and shut up.
by J'Mackafart September 19, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
10
Upon the act of fingering a woman and discovering the overwhelming stench of her vagina on your fingers causing your penis to regress into your stomach from how fucking bad it smells
Man: Dude i fingered my girlfriend that day and it smelt like shit
Man 2 : Whoa! dude how did you keep a boner?
Man: I didnt bro i fuckin FLATLINED!
by Panda0nXtc March 31, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
11
Commonly observed amongst youth in an intensive educational programme, such as the IB. The word flatline is used to indicate someone whose brain has (almost) ceased to function. Characteristic behaviour amongst individuals flatlining involve laughing at anything in sight, at each other, or at things that when viewed in retrospect, aren't funny in the least. Flatlining is believed to be the brains natural way of relieving stress on the body after having to actually think for an extended period of time.

Flatlining, when used in a broader sense, can be used to describe someone who is behaving abnormally, though the reason for which, must always be related to the stress and induced low blood sugar levels created by a day of intense learning and having to listen to lecturers repeat themselves like a group of chimpanzees mundanely bantering on about the global banana economy.
A group of high school graduates flatline on a Friday afternoon, after a double.
by Johnathan Spruce February 09, 2008
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
12
Metal band based out of Los Angeles. Usually associated with leather clad women drinking beer and being generally slutty, kick ass chicks.
Wow, man!! We went to that Flatline show at The Whisky, and they kicked ass! I also got to go home with a hottie in a Flaline T-shirt..
by Jason January 28, 2005
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
13
to get high to the point of feeling really awesome and eventually passing out
Dave: I had sex with HER???
Carlos: Yeah bro, you totally flatlined and you did it hahaaa.
Dave: Damn bro, why'd you have to tell me that??
Carlos: Cause now you gotta buy her birth control pills.
by blahblahhblahhh March 12, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
14
1. The effect caused after a severe case of insomnia in which you collapse immediately and sleep.

2. Used to describe an extreme measure of sleep. Incidentally this closely relates to the term "you can sleep when you're dead."
I didn't want to go anywhere, I had terrible sleep and when I came home from school I flatlined on the bed.

Person A: Hey where's Adam?
Person B: He got shitfaced and flatlined somewhere in the kitchen.
by xKRASHx August 28, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug